Air-purifying and ventilating device.



W. D. DOTY.

AIR PURIFYING AND VENTILATING DEVICE.

APPLICATIQN FILED JAN.8. I916.

UNITED, STATES PATENT OFFICE.

WILLIAM I). DQTY, or STREATOR, ILLINOIS, ASSIGNOR or ONE-HALF TO M TTHEWw.

- JACK, or STREATOR, ILLINOIS.

Specification of Letters Patent.

Patented Mar. 20,1917.

Application filed January 8, 1916. Serial N 0. 71,040.

To all whom/2'7, may concern:

Be it known that I, WILLIAM D. DOTY, a citizen of the United States,residing at Streator, in the county of La Salle and State of Illinois,have invented certain new and useful Improvements in Air-Purifying andVentilating Devices, of which the following is a specification.

This invention relates to air purifying and ventilating devices, and hasfor one of its objects to provide a simply constructed device which maybe arranged in a window opening or like locality and which operates toscreen and purify the air and also to provide suitable ventilationwithout creating drafts.

Another object of the invention is to provide a simply constructeddevice which may be readily adjusted to windows or other openings ofvarying widths without detach ing any of the parts. 7

Another object of the invention is to provide a device of this characterincluding ooacting frames slidablyengaged and which are constructedentirely of metal and adapted to support the screening or purifyingfabric.

With these and other objects in view, the invention consists in certainnovel features of construction as hereinafter shown and described andthen specifically pointed out the claims; and in the drawingsillustrative of the preferred embodiment of the invention Figure 1 is anelevation of the improved device;

Fig. 2 is a plan view, and

Fig. 3 is an end elevation of the same;

Fig. at is a perspective view of a portion of one of the side members ofone of-the frames;

Fig. 5 is a perspective view of a portion of one of the end members ofone of the frames;

Fig. 6 is a perspective vi w from beneath of a portion of one of theside members of the coacting frame;

Fig. 7 is a-perspective view from beneath of a portion of'one of the endmembers of the last-mentioned frame;

Fig. 8 is an enlarged transverse section on the line ss f Fig Fig. 9 isan enlarged longitudinal section on'the line 99 of Fig. '1;

Fig. 10 is a view similar to Fig. l illustrating a modification in theconstruction;

Fig. 11 is a longitudinal section on the line 11-11 of Fig. 10;

Fig. 12 is a vertical 12-12 of Fig. 10;

Fig. 13 is a perspective view of a portion of one of the modified framesshown in FigflO; I

Fig. 14 is a'perspective view of a portion of the other modified frameshown in Fig. 10.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The improved device includes coacting frames slidably engaged and eachhaving lateral projections provided with fabric engaging elements, suchas pins or spurs, with the adjacent end members of each frame providedwith a lateral ofi-set or projection extending toward the fabricmaterial of the other frame to out off the circulation of air betweenthe portions of the fabric members which overlap. The frame members maybe of any suitable material, either metal or wood, and for the purposeof illustration the frames are shown constructed ofmetal in Figs. 1 to9, and shown constructed of wood in Figs. 10 to 14. When constructed ofmetal one of the frames comprises side members 10''1l spaced apart andend members 12l3 likewise spaced apart. The side member 10 is turned atvits outer edge to form a longitudinally .directed guide-way 14, whilethe side member 11 is formed with a similar guide-way 15. The end member12 is preferably turned over at its outer edge, as shown at 16, tostrengthen and reinforce it, while the end member 13 is turned laterallyat one edge, as illustrated at 17, to form a cut-off rib, the object tobe hereafter explained. At their terminals the end members 12-13 overlapthe terminals of the side members 10-11 and are soldered or otherwisesecured thereto. The side member 10 is provided with a lateralprojection 18 while the side member llis provided with a Similar lateralprojection 19,

section on the line The end member 12 is provided with a similar lateralprojection 20, while the end member 13 is provided with a similarlateral projection 21. The projections 181920 21 are formed at the inneredges of the frame members, as shown. The inner lateral projections areprovided with fabric engaging elements in the form of studs or pins.indicated at 22. lVhen constructed of metal, as shown in Figs. 1 to 9,the fabric engaging elements are integral with the lateral projections,as shown more clearly in Figs. 4: and 5.

The coacting frame when constructed of metal comprises side members 232l and end members 2526. The side members slidably engage the guide ways1dl5. while the end member is turned over at the outer edge, asindicated at 27, to reinforce and strengthen the latter. The sidemembers 232st overlap the terminals of the end members 2526 and aresecured thereto by soldering or by other suitable means. The side member23 is provided with a laterally directed projection 28, while a similarlateral projection 29 extends from the side member 2 1. A similarlateral projection 30 extends from the end member 25, while a lateralprojection 31 extends from the end member 26. The lateral projections28293031 project from the coacting frame member at the side opposite tothe projections l819- 20-21 of the other frame, and are provided withfabric securing studs or pins 32.

The fabric which is secured to the studs is indicated conventionally at83 and may be of any suitable material, either cloth or screen material.If cloth is engaged as a fabric the latter will preferably be of coarsemesh to permit the air to freely pass while excluding dust or otherimpurities and may be impregnated with disinfecting material or thelike. As before stated, the end member 13 is turned 'down at one edge,as indicated at 17, to closely engage the adjacent face of the fabricwhich is attached to the coacting frame members. By this means the edge17 forms a cut-off to prevent the air passing between the portions ofthe fabric which overlap. By this arrangement it will be obvious that byemploying the studs or pins to support the fabric the latter may bereadily attached to, detached'from, renewed or changed as requiredwithout destroying or disconnecting any of the parts. By arranging theframes to slidably engage it will be obvious that the device may beincreased or decreased in length to adapt it to windows or otheropenings of various widths.

The improved device is designed to be employed more particularly beneaththe lower sash, or above the upper sash of a window, or both above andbelow, if preferred. The end members of the frames engage in theguide-ways of the sash, and the sashes close against the framememberswhen the latter are adjusted. The frames may be of any requiredsize and it is not desired to limit the invention in this respect.

lVhen the frames are constructed from wood the arrangement shown inFigs. 10 to 1A will be employed. One of the frames when constructed fromwood will include side members 34:35 and end members 36-? 7, while thecoacting frame is formed with side members 3S39 and end members 40-1LThe members 3d35-36-37 are each formed with rabbets, indicated at 42,the portion of the frames externally of the rabbets corresponding to thelateral projections of the structure shown in Figs. 1 to 9. The members3839 all-41 of the coacting frame are likewise provided with a similarrabbet, indicated at 13, with the portions of the frame membersexternally of the rabbet corresponding to the lateral projections of thecoacting frame shown in Figs. 1 to 9. The end member 37 of one of theframes is formed wider than the frame member 36,

while the frame member 11 is likewise wider than the frame member 10, asillustrated in Fig. 11. The confronting faces of the side members 34c35and3889 are formed with longitudinal grooves, indicated respectively4H5, while the wider portions of the members 37&1 are provided with ribs4E6-t7 to engage respectively in the channels. By this means the framemembers are slidably engaged and held from displacement by the coactionof the guide-channels 4A45 and the ribs 40-47. In the modification shownin Figs. 10 to 14 a plurality of pins, indicated at 18, project from theframe members within the rabbets to support the fabric ma-- terial, nowshown, and thus operating in the same manner and for the same purpose asthe studs 22 in the structure shown in Figs. 1 to 9.

Having thus described the invention,what is claimed as new is 1. Adevice of the class described, comprising coacting frames with theirconfronting faces slidably engaging, the body portion of each framemember having a part directed laterally therefrom and the outer edge ofeach laterally directed part providecl with aplurality of spurs spacedapart and adapted to be engaged by a fabric member.

2. A device of the class described, comprising coacting frames, one ofsaid frames having longitudinally directed guides to slidably receivethe other frame and each of said frames having a part directed laterallytherefrom and the outer edge of each laterally directed part providedwith a plurality of spurs spaced apart and adapted to be engaged by afabric member.

3. In a device of the class described, a

frame having lateral projections at the inner edges of its members withfabric engaging elements carried by the projections, the side members ofsaid frame having longitudinally directed guideways and one of the endmembers having a lateral projection at its outer edge, and a coactingframe having lateral projections at the inner edges of its memberscarrying fabric engaging elements, and with one of its end membersformed with another lateral projection, the side members of saidlast-mentioned frame slidably engaging the guides of the first-mentionedframe.

4. In a device of the class described a frame formed of side membershaving guide devices at their outer edges and lateral proj ections attheir inner edges, said lateral projections each carrying a plurality ofspurs extending in parallel relation to the side members, and endmembers secured by their terminals to the side members and each hav, inga lateral projection at its inner edge, said last mentioned projectionseach carrying a plurality of spurs directed in parallel relation to theend members, said spurs adapted to be engaged by a fabric element.

5. In a device of the class described, a frame formed of side membershaving lateral projections at their inner edges, each of saidprojections carrying a plurality of spurs directed in parallel relationto the frame members, and end members secured jections at their inneredges and carrying fabric supporting elements, and end members securedby their terminals to the side members and each having a lateralprojection at its inner edge and carrying fabric supporting elements,one of said end members having a lateral projection at the edge oppositeto the fabric supporting elements thereof, and a coacting frame formedof side members with lateral projections carrying fabric supportingelements and slidably engaging the guide devices of the first-mentionedframe, and end members secured at their terminals to the side membersand with lateral projections carrying fabric supporting elements, theouter edge of one of the end members of said last-mentioned frame havinga lateral projection at the edge opposite 7 to the fabric supportingelements thereof.

In testimony whereof I aflix my signature.

WILLIAM D. DOTY. 1,. 8.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

